Facies development along the tide-influenced shelf of the Burdigalian Seaway: An example from the Ottnangian stratotype (Early Miocene, middle Burdigalian)

Grunert, Patrick; Soliman, Ali; Ćorić, Stjepan; Roetzel, Reinhard; Harzhauser, Mathias; Piller, Werner E.

doi:10.1016/j.marmicro.2011.11.004

Cited by 43 publications

(41 citation statements)

References 70 publications

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“…Faupl & Roetzel 1987;Grunert et al 2010). While fully-marine, tidal dominated silts and sands represent Early and Middle Ottnangian transgressive and highstand phases, brackish-fluvial sediments of the Oncophora Beds were deposited during a Late Ottnangian regressive phase (Rögl 1998;Grunert et al 2012). As a result of their brackish character, a separation of the Oncophora Beds from the Innviertel Group is under discussion (Rupp et al 2008).…”

Section: Geological Settingmentioning

confidence: 99%

Neogene uplift and erosion in the Alpine Foreland Basin (Upper Austria and Salzburg)

Gusterhuber¹,

Dunkl²,

Hinsch³

et al. 2012

Geologica Carpathica

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Abstract:In the present paper we apply a multi-technique approach (shale compaction data, seismic stratigraphy, isopach maps, moisture content of lignite, fission track data) to assess timing and amount of uplift and erosion of the Alpine Foreland Basin. The combination of the different techniques allows us to discriminate the effects of two different erosion events during the Neogene: (1) Seismic stratigraphy and isopach maps indicate a Karpatian (Early Miocene) regional tilting of the basin to the west (slope of about 0.5 %) and a minor erosion phase. (2) Moisture content of lignite combined with fission track data provides evidence for extensive regional uplift after deposition of Late Miocene fluvial deposits. It is estimated that sediments, 500 to 900 m thick, have been eroded. Shale compaction data derived from sonic logs indicates additional uplift of the eastern part of the basin (near the river Enns). Here, 300 to 1000 m of sediments were additionally eroded (giving a total erosion of about 1000 to 1900 m!), with a general increase of erosion thickness towards the northeast. While the regional uplift is probably related to isostatic rebound of the Alps after termination of thrusting, the local uplift in the east could be affected by Late Neogene E-W compressional events within the Alpine-Pannonian system. Both, tilting and erosion influence the hydrocarbon habitat in the Molasse Basin (tilting of oil-water contacts, PVT conditions, biodegradation).

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Section: Geological Settingmentioning

confidence: 99%

Neogene uplift and erosion in the Alpine Foreland Basin (Upper Austria and Salzburg)

Gusterhuber¹,

Dunkl²,

Hinsch³

et al. 2012

Geologica Carpathica

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“…After that, the plankton/benthos (P/B) ratio was calculated for each sample. Benthic foraminifera species were identified according to Papp et al (1978), Papp & Schmid (1985), Loeb lich & Tappan (1987a,b) and Cicha et al (1998), while palaeoecological proxies were co-opted from Kaiho (1994Kaiho ( , 1999; Den Dulk et al (2000), Hohenegger (2005), Van Hinsbergen et al (2005), Báldi (2006), , Holcová & Zágoršek (2008), Pippèrr & Reichenbacher (2010), De & Gupta (2010), Grunert et al (2012), Pérez-Asensio et al (2012) and Pezelj et al (2013). Each standardized sample was carefully checked (the presence of size-sorting, fragmentation, abrasion, corrosion, and the incongruence of stratigraphic ranges and palaeoecological preferences), in order to exclude redeposited and transported specimens of benthic foraminifera from statistical analysis (Murray 1991;Holcová 1999).…”

Section: Methodsmentioning

confidence: 99%

Shallow-water benthic foraminiferal assemblages and their response to the palaeoenvironmental changes — example from the Middle Miocene of Medvednica Mt. (Croatia, Central Paratethys)

Pezelj¹,

Sremac²,

Bermanec³

2016

Geologica Carpathica

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During the Middle Miocene, the northern Croatian Medvednica Mt. was an island within the Pannonian Basin System, situated on the SW margin of the Central Paratethys Sea. Miocene sedimentary rocks (the Late Badenian Bulimina-Bolivina Zone and Ammonia beccarii ecozone), from the SW slopes of Medvednica Mt. clearly reflect a transgressive-regressive cycle with emersion during the Badenian/Sarmatian boundary. After the initial phase of transgression, the pioneer Elphidium-Asterigerinata-Ammonia benthic foraminiferal assemblage is present in bioclastic limestones, such as those at the Borovnjak locality. This marginal marine assemblage from a highly energetic, normally saline environment is characterized by poor preservation of foraminiferal tests, low diversity and strong domination. Advanced transgression is followed by establishment of the Elphidium-Asterigerinata assemblage, which is found in biocalcsiltites from the laterally deeper and more sheltered environment at Gornje Vrapče. This diverse assemblage is typical for inner/middle shelf environment with sufficient oxygen content. A general shallowing upward trend can be recognized at both localities, followed by visible interchange of different sedimentological and biotic features. Successive and oscillatory regression in the marginal marine environment was followed by salinity fluctuations and final brackish conditions with Ammonia-Elphidium assemblage. The laterally deeper environment reacted to regressive trends on finer scale with almost regular changes of benthic foraminiferal assemblages in the laminae (Heterolepa-Bolivina assemblage/Bolivina-Cassidulina assemblage/Elphidium-Asterigerinata assemblage). It might reflect sea-level oscillations with periodically increased siliciclastic and nutrient input from land or influence of seasonality on benthic assemblages, which occurred in the advanced phase of the regression near the Badenian/Sarmatian boundary.

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“…The paleoecological preferences of planktonic foraminifera with respect to surface water temperature and productivity were also summarized (Table 2). GRUNERT et al (2012);. KAIHO (1994); (n).…”

Section: The Diversity Indices (Fisher's Alpha and Shan-mentioning

confidence: 99%

“…6). The genus Lenticulina is a shallower-water taxon (see Table 1), which has been reported as a significant component of assemblages from EggenburgianOttnangian outer-neritic deposits of the Alpine Foreland Basin (GRUNERT et al, 2012).…”

Section: Paleoecology Of Benthic Foraminiferamentioning

confidence: 99%

Biostratigraphy and paleoenvironmental reconstruction of the marine lower Miocene Chechiș Formation in the Transylvanian Basin based on foraminiferal assemblages

Székely¹,

Bindiu-Haitonic²,

Filipescu³

et al. 2017

Carnets Geol.

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Planktonic and benthic foraminiferal assemblages were used for biostratigraphy and paleoenvironmental reconstruction of the marine lower Miocene Chechiș Formation from the Gălpâia section (Sălaj county, Romania) in the northwestern Transylvanian Basin. Planktonic foraminifera suggest an Eggenburgian (Burdigalian) age for the deposits studied and reveal episodes of high primary productivity and mostly cool surface waters. Benthic foraminiferal assemblages indicate paleoenvironmental deepening from outer shelf to upper bathyal settings. Deltaic influences may be observed at the base of the studied section in outer shelf (possibly upper bathyal) environments with oxygenated bottom water and episodic high primary productivity, as a consequence of nutrient input from the land. Changes in paleobathymetry resulted in reduction of primary productivity. The benthic assemblages from the uppermost part of the section are dominated by tubular agglutinated foraminifera and indicate an upper bathyal setting with low organic flux to the sea floor. The sediments of the studied section were deposited during the late stage of the first early Miocene relative sea-level rise in the Transylvanian Basin. Key-words:• Foraminifera;

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Facies development along the tide-influenced shelf of the Burdigalian Seaway: An example from the Ottnangian stratotype (Early Miocene, middle Burdigalian)

Cited by 43 publications

References 70 publications

Neogene uplift and erosion in the Alpine Foreland Basin (Upper Austria and Salzburg)

Neogene uplift and erosion in the Alpine Foreland Basin (Upper Austria and Salzburg)

Shallow-water benthic foraminiferal assemblages and their response to the palaeoenvironmental changes — example from the Middle Miocene of Medvednica Mt. (Croatia, Central Paratethys)

Biostratigraphy and paleoenvironmental reconstruction of the marine lower Miocene Chechiș Formation in the Transylvanian Basin based on foraminiferal assemblages

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